When I Comb My Hair, I See Thinner Hairs Falling Out

Dear Dr Rassman,

You often recommend that people get their hair mapped with a densitometer. I am still trying to find someone in my area to perform this. But here’s the question. I can see very clearly when I comb my hair that some of the hairs that fall out are shorter, thinner, and lighter in color than others. I can also see that many hairs along my front hair line and at my temples also look this way. Aren’t these hairs “miniaturized”? Is there anything other than common pattern hair loss that causes such miniaturization?

Male, age 28

The thinner, lighter hairs you likely see at the frontal hairline and temples are called vellus hairs in normal non-balding men and they could be miniaturized hairs as well in the balding male. Vellus hairs are normal and help to create the visual transition from hair to no hair (from scalp to face). The hairs that you see coming out when you comb could be miniaturized hairs which are weaker hairs being pulled out by the brushing or they could be coming out as part of the natural hair cycling process. I’m not sure that what you’re seeing indicates genetic hair loss. That being said, I’m just going off of what you wrote and haven’t seen you to be able to form any kind of opinion on your state of balding.

If you can’t find someone in your area, you can map it yourself with the right tools (and by watching a video tutorial).